…why bore others needlessly

Category Archives: Uncategorized

Running PulseAudio in system mode is usually a bad idea. There are use cases however, where PulseAudio’s system mode is a great tool, e.g. for building a PulseAudio streaming target to stream audio from multiple clients to speakers. First, install PulseAudio, avahi (a free implementation of zeroconf) to publish the service throughout the network and the corresponding PulseAudio module: Since… Read more »

There’s a bug in Fedora 20 and RHEL 7, where the legacy network service does not set the default route properly. This is due to the fact, that the network service does not evaluate the GATEWAY0 directive in /etc/sysconfig/network-scripts/ifcfg-ethX that is used by NetworkManager. To set the default route with the legacy network service, simply change GATEWAY0 to GATEWAY: Of… Read more »

Link aggregation is a method of bundling interfaces together to act as one for increased bandwith and/or failover. One of most used protocols, next to a couple of proprietary ones, for controlling such a channel bond is LACP, the Link Aggregation Control Protocol. 1. Configuring LACP on Dell S4810 Let’s assume, we want to bond two 10G Ethernet ports together,… Read more »

While the squid proxy server has quite a few different flavours of authentication available, one of the most basic ones, pam_auth, is also one of the most useful ones to get you started quickly. pam_auth let’s anyone who has a local account access the squid proxy. In large environments you probably want to use ldap authentication eventually, but pam_auth is… Read more »

Baikal is a lightweight, free and open-source CalDAV and CardDAV server implementation that allows you to synchronize your address book and appointments with multiple clients such as mobile devices or a desktop application like Thunderbird. It lacks a couple of important features for enterprise use cases, such as address book and calendar sharing between multiple users, but it’s very suitable… Read more »

Installing kvm on a recent Fedora OS is quite easy. Fedora already ships all the necessary software packages and kernel modules for running a kernel virtualised machine. 0. Prerequisites Since late 2005 / early 2006 almost every x86 processor is capable of hardware virtualization. To check if your CPU supports Intel’s VT-d or AMD’s Pacifica, which is a requirement for… Read more »

To invoke logrotate manually to debug configuration settings, there is a builtin debug flag: To force a log file rotation, regardless of the specified criteria (such as age, minsize, etc.), run: Keep in mind, that you can use individual logrotate configuration files from /etc/logrotate.d/ but settings are inherited from the global logrotate config /etc/logrotate.conf. For a comprehensive list of options,… Read more »

Setting up an ownCloud instance is rather straight forward. OwnCloud6 rpm packages for recent Fedora versions (20+) already exist and can be easily installed with yum. Unfortunately, ownCloud’s storage mechanism is rather slow compared to other private cloud solution like Seafile or SparkleShare. However the overall speed can be improved greatly by switching from the most obvious and most popular… Read more »

One of the great advantages of using OpenVPN with RSA keys instaed of static keys is the fact that you can easily disable access to the server for a specific client without the need to re-create keys for any other client. This is called revoking of client certificates. Since every single client’s certificate is verified against a Certificate Revoking List… Read more »